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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsRadioactivityEasy2 minPYQ_2020

PhysicsEasysingle choice

The half-life period of a radioactive element $X$ is the same as the mean lifetime of another radioactive element $Y$ . Initially, they have the same number of atoms. Then

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Answer:

Solution:

According to the question,

$T_{\frac{1}{2}} (X) = τ (Y)$

$\Rightarrow \frac{0.693}{λ_{X}} = \frac{1}{λ_{Y}}$

$\Rightarrow λ_{Y} = \frac{λ_{X}}{0.693}$

$\Rightarrow λ_{Y} > λ_{X}$

This means, $X$ will decay faster than $Y .$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Radioactivity

⏱ 2mℹ️ Source: PYQ_2020

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